# Sound Level & Spectrogram vs Routine Time Watch

The clearest difference is price: Sound Level & Spectrogram at Free against Routine Time Watch's $0.99. Routine Time Watch's advantage is ads (none vs shown) and update cadence (every 3 days vs every 5 months). On in-app purchases and iOS requirement there is nothing between them.

Sound Level & Spectrogram is free to download; Routine Time Watch costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sound Level & Spectrogram ships an update every 5 months, Routine Time Watch every 3 days. The most recent releases landed on October 6, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Sound Level & Spectrogram | Routine Time Watch |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 4 MB | 13 MB |
| Requires iOS | 18.7 | **18.4** |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [kobunachou ozawa](https://appshunter.io/developer/1071744258) |

## What reviewers say

### Sound Level & Spectrogram

[App page](https://appshunter.io/ios/app/sound-level-and-spectrogram/id6503722682)

Measure sound levels in decibels and visualize sound frequencies with a real-time spectrogram. Understand your environment's noise and protect your health. Offers advanced settings for accurate acoustic analysis.

**Highlights:** Sound level measurement (dB), Real-time spectrogram analysis, Frequency weighting correction (A, C, Z), Time weighting characteristics (Fast, Slow), Time course graph, Environmental noise measurement

**In-app purchases:** none


### Routine Time Watch

[App page](https://appshunter.io/ios/app/routine-time-watch/id6749266542)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sound Level & Spectrogram free?

Sound Level & Spectrogram is free to download, with no in-app purchases.

### Is Routine Time Watch free?

Routine Time Watch costs $0.99, with no in-app purchases.

### Do Sound Level & Spectrogram or Routine Time Watch have ads?

Sound Level & Spectrogram shows ads; Routine Time Watch does not.

### Which is updated more often, Sound Level & Spectrogram or Routine Time Watch?

Sound Level & Spectrogram ships an update every 5 months, and Routine Time Watch every 3 days. Most recently, Sound Level & Spectrogram was updated on October 6, 2026 and Routine Time Watch on September 23, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*